%%?BER?Performance?of?Several?Equalizer?Types
%?This?script?shows?the?BER?performance?of?several?types?of?equalizers?in?a
%?static?channel?with?a?null?in?the?passband.??The?script?constructs?and
%?implements?a?linear?equalizer?object?and?a?decision?feedback?equalizer?（DFE）
%?object.??It?also?initializes?and?invokes?a?maximum?likelihood?sequence
%?estimation?（MLSE）?equalizer.??The?MLSE?equalizer?is?first?invoked?with?perfect
%?channel?knowledge?then?with?a?straightforward?but?imperfect?channel
%?estimation?technique.
%
%?As?the?simulation?progresses?it?updates?a?BER?plot?for?comparative?analysis
%?between?the?equalization?methods.??It?also?shows?the?signal?spectra?of?the
%?linearly?equalized?and?DFE?equalized?signals.??It?also?shows?the?relative
%?burstiness?of?the?errors?indicating?that?at?low?BERs?both?the?MLSE?algorithm
%?and?the?DFE?algorithm?suffer?from?error?bursts.??In?particular?the?DFE?error
%?performance?is?burstier?with?detected?bits?fed?back?than?with?correct?bits?fed
%?back.??Finally?during?the?“imperfect“?MLSE?portion?of?the?simulation?it
%?shows?and?dynamically?updates?the?estimated?channel?response.
%
%?This?script?relies?on?several?other?scripts?and?functions?to?perform?link
%?simulations?over?a?range?of?Eb/No?values.??These?files?are?as?follows:
%
%??-?a?script?that?runs?link
%?simulations?for?linear?and?DFE?equalizers
%
%??-?a?script?that?runs?link?simulations
%?for?ideal?and?imperfect?MLSE?equalizers
%
%????-?a?script?that?generates?a?BPSK
%?signal?with?no?pulse?shaping?then?processes?it?through?the?channel?and?adds
%?noise
%
%?eqber_graphics?-?a?function?that?generates?and?updates?plots?showing?the
%?performance?of?the?linear?DFE?and?MLSE?equalizers.??Type?“edit
%?eqber_graphics“?at?the?MATLAB?command?line?to?view?this?file.
%
%?The?scripts?eqber_adaptive?and?eqber_mlse?illustrate?how?to?use?adaptive?and
%?MLSE?equalizers?across?multiple?blocks?of?data?such?that?state?information?is
%?retained?between?data?blocks.
%
%?To?experiment?with?this?demo?you?can?change?such?parameters?as?the?channel
%?impulse?response?the?number?of?equalizer?tap?weights?the?recursive?least
%?squares?（RLS）?forgetting?factor?the?least?mean?square?（LMS）?step?size?the
%?MLSE?traceback?length?the?error?in?estimated?channel?length?and?the?maximum
%?number?of?errors?collected?at?each?Eb/No?value.

%???Copyright?1996-2004?The?MathWorks?Inc.
%???$Revision:?1.1.4.1?$??$Date:?2004/06/30?23:03:12?$


%%?Signal?and?channel?parameters
%?Set?parameters?related?to?the?signal?and?channel.??Use?BPSK?without?any?pulse
%?shaping?and?a?5-tap?real-valued?symmetric?channel?impulse?response.??（See
%?section?10.2.3?of?Digital?Communications?by?J.?Proakis?for?more?details?on?the
%?channel.）??Set?initial?states?of?data?and?noise?generators.??Set?the?Eb/No
%?range.

%?System?simulation?parameters
Fs??????=?1;??????%?sampling?frequency?（notional）
nBits???=?2048;???%?

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----

?????文件??????10130??2012-04-27?20:38??eqberdemo\eqberdemo.asv

?????文件??????26337??2004-06-30?17:15??eqberdemo\eqberdemo.html

?????文件??????10129??2004-06-30?17:15??eqberdemo\eqberdemo.m

?????文件???????4381??2004-06-30?17:15??eqberdemo\eqberdemo.png

?????文件???????4256??2004-06-30?17:15??eqberdemo\eqberdemo_01.png

?????文件???????5813??2004-06-30?17:15??eqberdemo\eqberdemo_02.png

?????文件???????4078??2004-06-30?17:15??eqberdemo\eqberdemo_03.png

?????文件???????4891??2004-06-30?17:15??eqberdemo\eqberdemo_04.png

?????文件???????6458??2004-06-30?17:15??eqberdemo\eqberdemo_05.png

?????文件???????3984??2004-06-30?17:15??eqberdemo\eqberdemo_06.png

?????文件???????4888??2004-06-30?17:15??eqberdemo\eqberdemo_07.png

?????文件???????7295??2004-06-30?17:15??eqberdemo\eqberdemo_08.png

?????文件???????4038??2004-06-30?17:15??eqberdemo\eqberdemo_09.png

?????文件???????8747??2004-06-30?17:15??eqberdemo\eqberdemo_10.png

?????文件???????4342??2004-06-30?17:15??eqberdemo\eqberdemo_11.png

?????文件???????4080??2004-06-30?17:15??eqberdemo\eqberdemo_12.png

?????文件???????9460??2004-06-30?17:15??eqberdemo\eqberdemo_13.png

?????文件???????1923??2004-07-06?16:50??eqberdemo\eqberREADME.txt

?????文件??????12718??2004-06-30?17:15??eqberdemo\eqber_adaptive.html

?????文件???????4667??2004-06-30?17:15??eqberdemo\eqber_adaptive.m

?????文件??????23673??2004-06-30?17:15??eqberdemo\eqber_graphics.m

?????文件??????14074??2004-06-30?17:15??eqberdemo\eqber_mlse.html

?????文件???????5345??2004-06-30?17:15??eqberdemo\eqber_mlse.m

?????文件???????4059??2004-06-30?17:15??eqberdemo\eqber_siggen.html

?????文件????????986??2004-06-30?17:15??eqberdemo\eqber_siggen.m

?????文件???????1279??2004-08-30?15:08??eqberdemo\figposition.m

?????文件????????155??2012-04-06?00:05??eqberdemo\test\fun_sa.m

?????文件????????263??2012-04-06?00:17??eqberdemo\test\UWA_channel.m

?????目錄??????????0??2012-04-06?00:01??eqberdemo\test

?????目錄??????????0??2012-04-27?20:42??eqberdemo

............此處省略3個文件信息